反射式光纤温度传感器的研究  

Study on Reflection Type Optical Fiber Temperature Sensor

作　　者：李艳萍[1] 郭秀梅[1] 刘海涛[2] 王建[1] 马崇萧[1] 

机构地区：[1]河北科技师范学院机电工程学院,河北昌黎066600 [2]河北建材职业技术学院,河北秦皇岛066000

出　　处：《计算机测量与控制》2010年第9期2201-2202,2206,共3页Computer Measurement &Control

基　　金：河北省秦皇岛市自然科学研究(200901A042)

摘　　要：在分析了半导体吸收光能原理的基础上提出了一种新型的光纤温度传感器;它以半导体GaAs作为温度敏感元件,采用反射式探头结构,通过光纤传输,实现了测量现场探头和二次仪表的隔离,既避免了带电系统对探头中半导体器件的影响,又避免了测量现场高温工作环境对后续电子器件的影响;通过设置参考通道来减少光源波动以及光纤连接损耗等因素的影响,提高了测量精度;实验证明,在20~140℃的测量范围内精确度可达1℃,可用于电力系统的温度监测。On the basis of the analysis of the theory on semiconductor absorbing light energy,a novel fiber-optic temperature sensor was presented.A reflected probe configuration was designed,in which the semiconductor GaAs was its temperature-sensing element.The system transmitting signals through the optical fiber keeps the isolation between secondary instrumentation and measuring field,by which not only the influence of the charged system to the semiconductor device in the probe has been avoided,but also the influence of the high-temperature measuring field to the following electronic device has been avoided.The reference channel was set to reduce the fluctuations in light source and optical fiber connection loss and other factors.Two experiments show that measurement accuracy reaches 1℃ over a temperature range from 20℃ to 150℃.The system can be used to monitor the temperature of the electrical power system.

关 键 词：光纤 温度 反射式 电力系统 

分 类 号：TP212.11[自动化与计算机技术—检测技术与自动化装置]